Longines HydroConquest

The Longines HydroConquest, reference L3.740.3.56.7, is a dive watch with a 41 mm round case with a yellow PVD coating. The sunray black dial carries applied Arabic numerals and indexes alongside gilt hands. The case is 11.9 mm thick and 51.1 mm lug-to-lug, with water resistance rated to 300 metres; the case has a screw-down crown. Power comes from quartz calibre L157.3, powered by a RENATA 371 battery. A scratch-resistant sapphire crystal covers the hour and minute display, with several layers of anti-reflective coating on the underside. A date display and central seconds appear on the dial. The case has a unidirectional rotating bezel. A yellow PVD-coated bracelet fastens with a double safety folding clasp.